Fabrication of planar gradient index cylindrical microlenses and their application to laser diode collimation

Torsten Possner; Rolf Goering

doi:10.1117/12.163663

25 November 1993 Fabrication of planar gradient index cylindrical microlenses and their application to laser diode collimation

Torsten Possner, Rolf Goering

Author Affiliations +

Proceedings Volume 2000, Current Developments in Optical Design and Optical Engineering III; (1993) https://doi.org/10.1117/12.163663
Event: SPIE's 1993 International Symposium on Optics, Imaging, and Instrumentation, 1993, San Diego, CA, United States

Abstract

Using the Ag⁺-Na⁺ exchange in a special optical glass one- and two- dimensional refractive index profiles of definite shape have been realized. It is shown that good quality one-dimensional parabolic profiles can be used for micro-cylindrical lens fabrication with high possible numerical aperture N.A. <EQ 0.46. Two-dimensional refractive index gradients of stripe waveguide geometry generated by field assisted ion exchange through a linear mask window form single cylindrical lenses as well as cylindrical lens arrays with comparable low N.A. <EQ 0.15 which can be used for the transformation of the weakly divergent direction of a laser diode or laser diode bars. Two crossed lenses of different numerical aperture are applicable for high power laser diode collimation.

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Torsten Possner and Rolf Goering "Fabrication of planar gradient index cylindrical microlenses and their application to laser diode collimation", Proc. SPIE 2000, Current Developments in Optical Design and Optical Engineering III, (25 November 1993); https://doi.org/10.1117/12.163663

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